linux-kernel - Re: [PATCH v4 0/9] introduce VM_MAYBE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <20251118093348.9dac5d7142dc6df182833612@linux-foundation.org>
Date: Tue, 18 Nov 2025 09:33:48 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: Jonathan Corbet <corbet@....net>, David Hildenbrand <david@...hat.com>,
 "Liam R . Howlett" <Liam.Howlett@...cle.com>, Vlastimil Babka
 <vbabka@...e.cz>, Mike Rapoport <rppt@...nel.org>, Suren Baghdasaryan
 <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>, Steven Rostedt
 <rostedt@...dmis.org>, Masami Hiramatsu <mhiramat@...nel.org>, Mathieu
 Desnoyers <mathieu.desnoyers@...icios.com>, Jann Horn <jannh@...gle.com>,
 Pedro Falcato <pfalcato@...e.de>, Zi Yan <ziy@...dia.com>, Baolin Wang
 <baolin.wang@...ux.alibaba.com>, Nico Pache <npache@...hat.com>, Ryan
 Roberts <ryan.roberts@....com>, Dev Jain <dev.jain@....com>, Barry Song
 <baohua@...nel.org>, Lance Yang <lance.yang@...ux.dev>,
 linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
 linux-doc@...r.kernel.org, linux-mm@...ck.org,
 linux-trace-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, Andrei
 Vagin <avagin@...il.com>
Subject: Re: [PATCH v4 0/9] introduce VM_MAYBE_GUARD and make it sticky

On Tue, 18 Nov 2025 10:17:42 +0000 Lorenzo Stoakes <lorenzo.stoakes@...cle.com> wrote:

> Currently, guard regions are not visible to users except through
> /proc/$pid/pagemap, with no explicit visibility at the VMA level.
> 
> This makes the feature less useful, as it isn't entirely apparent which
> VMAs may have these entries present, especially when performing actions
> which walk through memory regions such as those performed by CRIU.
> 
> This series addresses this issue by introducing the VM_MAYBE_GUARD flag
> which fulfils this role, updating the smaps logic to display an entry for
> these.

I updated mm-unstable to this version.